RP2040(RPi Pico) with PIO USB Host Fails at Get 8 byte of Device Descriptor

[Helloyunho]

I'm using my Raspberry Pi Pico to convert MIDI input(PIO host)(MIDI device specifically Launchpad MK2) to a custom USB signal(micro-USB port on Pico).

USBD works fine, but when I plug my Launchpad to Pico, it fails at Get 8 byte of Device Descriptor.

I cannot connect it to debugger right now.

Below is the log(of USBH only):

[1:] USBH Device Attach
Full Speed
[1:0] Open EP0 with Size = 8
Get 8 byte of Device Descriptor
[1:0] Get Descriptor: 80 06 00 01 00 00 08 00 
[:0] on EP 00 with 0 bytes: FAILED
[1:0] Control FAILED 1/3, retrying
[:0] on EP 00 with 0 bytes: FAILED
[1:0] Control FAILED 2/3, retrying
[:0] on EP 00 with 0 bytes: FAILED
[1:0] Control FAILED 3/3, retrying
[:0] on EP 00 with 0 bytes: FAILED
[1:0] Control FAILED, xferred_bytes = 0
80 06 00 01 00 00 08 00 

Enumeration attempt 2/3
[1:0] Get Descriptor: 80 06 00 01 00 00 08 00 
[:0] on EP 00 with 0 bytes: FAILED
[1:0] Control FAILED 1/3, retrying
[:0] on EP 00 with 0 bytes: FAILED
[1:0] Control FAILED 2/3, retrying
[:0] on EP 00 with 0 bytes: FAILED
[1:0] Control FAILED 3/3, retrying
[:0] on EP 00 with 0 bytes: FAILED
[1:0] Control FAILED, xferred_bytes = 0
80 06 00 01 00 00 08 00 

Enumeration attempt 3/3
[1:0] Get Descriptor: 80 06 00 01 00 00 08 00 
[:0] on EP 00 with 0 bytes: FAILED
[1:0] Control FAILED 1/3, retrying
[:0] on EP 00 with 0 bytes: FAILED
[1:0] Control FAILED 2/3, retrying
[:0] on EP 00 with 0 bytes: FAILED
[1:0] Control FAILED 3/3, retrying
[:0] on EP 00 with 0 bytes: FAILED
[1:0] Control FAILED, xferred_bytes = 0
80 06 00 01 00 00 08 00 

[1:0:0] USBH DEVICE REMOVED

[Helloyunho]

So an update: my random flash drive actually passes that part(it's not a midi device tho so it doesn't work obviously)
But it still fails at getting full descriptor... maybe related to #3149?

[Helloyunho]

Another update: my USB mouse receiver works and doesnt fail on descriptor
Plugging Launchkey MK3(another MIDI device from same company) makes pi stuck at Get 8 bytes of Device Descriptor(different issue than above, it gets the control data then it stuck at there until I unplug it)

[hathach]

use master branch of both tinyus and pio-usb to see if it help, you can also try sekigon-gonnoc/Pico-PIO-USB#186 as well. If that does not work, unfortunately it is device specific issue i.e your device has some timing expectation that pio-usb does not meet. It is big banging afterall.

[Helloyunho]

It still fails... Is there no way to fix this? Like manually adjust timing or etc?

[hathach]

yeah, you can try, https://github.com/sekigon-gonnoc/Pico-PIO-USB/blob/main/src/pio_usb_host.c there is no docs and no easy way though. You also need a decent analyzer to make check what is wrong with the timing. Unfortunately as said above, this is device specific issue, and need actual (or similar) device to test/troubleshoot.

[Helloyunho]

Sadly I don't have equipments like logic analyzer so I probably can't fix the issue without someone else's help...

[hathach]

you can try to run rp2040 at 240mhz to see if that helps, it often make the timing faster. Other than, you have to wait for more future update on either tinyus or pio-usb to see if that work with your device.

[Helloyunho]

Again, doesn't work.. I think I should wait until someone else help this problem